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Python constructors and __init__
...nce of C after it is created.
For example Python allows you to do:
class Test(object):
pass
t = Test()
t.x = 10 # here you're building your object t
print t.x
But if you want every instance of Test to have an attribute x equal to 10, you can put that code inside __init__:
class Test(obj...
How can I prevent the backspace key from navigating back?
...
This code solves the problem, at least in IE and Firefox (haven't tested any other, but I give it a reasonable chance of working if the problem even exists in other browsers).
// Prevent the backspace key from navigating back.
$(document).unbind('keydown').bind('keydown', function (event) ...
Proper way to return JSON using node or Express
...response with as small load as possible.
$ curl -i -X GET http://echo.jsontest.com/key/value/anotherKey/anotherValue | underscore print
https://github.com/ddopson/underscore-cli
share
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improve t...
Should I use a class or dictionary?
...w_style class and a new_style class with slots.
Here's the code i used to test it(it's a bit messy but it does the job.)
import timeit
class Foo(object):
def __init__(self):
self.foo1 = 'test'
self.foo2 = 'test'
self.foo3 = 'test'
def create_dict():
foo_dict = ...
startsWith() and endsWith() functions in PHP
...tack, $needle, -strlen($needle)) === 0;
}
This should be one of the fastest solutions on PHP 7 (benchmark script). Tested against 8KB haystacks, various length needles and full, partial and no match cases. strncmp is a touch faster for starts-with but it cannot check ends-with.
...
call a static method inside a class?
...
Let's assume this is your class:
class Test
{
private $baz = 1;
public function foo() { ... }
public function bar()
{
printf("baz = %d\n", $this->baz);
}
public static function staticMethod() { echo "static method\n"; }
}
F...
How do you tell if a string contains another string in POSIX sh?
...xpansion, so it works in Bash, Dash, KornShell (ksh), Z shell (zsh), etc.
test "${string#*$word}" != "$string" && echo "$word found in $string"
A functionalized version with some examples:
# contains(string, substring)
#
# Returns 0 if the specified string contains the specified substrin...
Bash if [ false ] ; returns true
...
You are running the [ (aka test) command with the argument "false", not running the command false. Since "false" is a non-empty string, the test command always succeeds. To actually run the command, drop the [ command.
if false; then
echo "True"
el...
What are the differences between the threading and multiprocessing modules?
...on for this, there must be other Python inefficiencies coming into play.
Test code:
#!/usr/bin/env python3
import multiprocessing
import threading
import time
import sys
def cpu_func(result, niters):
'''
A useless CPU bound function.
'''
for i in range(niters):
result = ...
Find() vs. Where().FirstOrDefault()
...
I just found out today, doing some tests on a list of 80K objects and found that Find() can be up to 1000% faster than using a Where with FirstOrDefault(). I didn't know that until testing a timer before and after each all. Sometimes it was the same time, ot...